Comparative Efficacy of Chemical Salts and Fungicides for Controlling Date Fruit Rots

Kassem, Aya Hussein; Alabbasy, Ezz Gad; Alshaikh, Mohamed Mostafa; Abd-Elmonaim, Mohamed

doi:10.21608/aujst.2023.312944

Comparative Efficacy of Chemical Salts and Fungicides for Controlling Date Fruit Rots

Document Type : Original papers

Authors

¹ Assistant researcher, CLDPRD, Agricultural Research Center

² Head Research at the Central Laboratory for Date palm Researches and Development, Agricultural Research Centre., Giza, Egypt.

³ Prof. of Plant Pathology, Al-Azhar Univ. Assuit

⁴ Assistant professor of Plant Pathology, Faculty of Agriculture, Aswan University

10.21608/aujst.2023.312944

Abstract

Different chemical salts were used to study the inhibitory activities under orchard and cold storage conditions. Date revealed that the increasing salt concentrations from 1g to 3g/l.w significantly decreased the decay caused with the tested fungi during 2019 and 2020 growing seasons. The tested salts when sprayed on date bunch at the rate 3g/l.w strongly reduced the fungal infection during storage. Calcium chloride with the highest concentrations was the most effective salt in reducing decay, followed by calcium carbonate and ammonium sulphate when used at 3g/l.w during 2019 and 2020 seasons. At the same time, using chemical salts as a dipping treatments revealed that calcium carbonate, followed by calcium chloride each at 3g/l.water were the most effective salts in minimizing disease severity caused with the tested fungi during 2019 and 2020 seasons if compared with control treatment. Also, ammonium sulphate at the rate 3g/l.w gave higher effect in reducing disease severity. Different concentrations of five fungicides were tested to study their efficacy in prevention and/or minimizing mycelial growth of A.alternata, C.herbarum and Th.paradoxa. Switch, Bellis and Rovral were the most effective fungicides in inhibition mycelial growth of A.alternata, when used with all concentrations. Mycelial growth of C.herbarum was entirely inhibited with Bellis and Rovral fungicides. The same data revealed that Switch, Bellis and Rovral completely prevented mycelial growth of Th.paradoxa. Different concentrations of Switch, Bellis, Rovral and Maystic fungicides were used as foliar spray on date bunches under orchar conditions.

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